Starnge blue screen after I play with my touch app

Just as the title says I am having a small issue where my screen turns blue after I leave my fingers pressed on the screen for a while and my circles that are drawn beneath my fingertips also become blue but with black contours so they are not completely gone except for their initial colors. Am I missing something from the tutorial? Thank you so much in advance!

// The string that appears in the application's title bar.
TCHAR szTitle[] = _T("Hello World!");

//Instancing the handler
HINSTANCE hInst;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

//Maximum ammount of touches allowed
#define MAXPOINTS 10

// You will use this array to track touch points
int points[MAXPOINTS][2];

// You will use this array to switch the color / track ids
int idLookup[MAXPOINTS];

// You can make the touch points larger
// by changing this radius value
static int radius = 30;

// There should be at least as many colors
// as there can be touch points so that you
// can have different colors for each point
COLORREF colors[] = { RGB(153,255,51),
RGB(153,0,0),
RGB(0,153,0),
RGB(255,255,0),
RGB(255,51,204),
RGB(0,0,0),
RGB(0,153,0),
RGB(153, 255, 255),
RGB(153,153,255),
RGB(0,51,153)
};

// The parameters to CreateWindow explained:
// szWindowClass: the name of the application
// szTitle: the text that appears in the title bar
// WS_OVERLAPPEDWINDOW: the type of window to create
// CW_USEDEFAULT, CW_USEDEFAULT: initial position (x, y)
// 500, 100: initial size (width, length)
// NULL: the parent of this window
// NULL: this application does not have a menu bar
// hInstance: the first parameter from WinMain
// NULL: not used in this application
HWND hWnd = CreateWindow(
szWindowClass,
szTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
800, 600,
NULL,
NULL,
hInstance,
NULL
);